This annual report reflects changes to the National Institute of Justice's Drug Use Forecasting program. After several years of development and testing, the restructured program was fully implemented in 2000 as Arrestee Drug Abuse Monitoring (ADAM). Probability-based sampling was adopted, the interview instrument (questionnaire) was enhanced to cover several new areas of drug use and related behavior, and the number of sites was increased. As in the past, it presents information about arrestees drug use, both overall and site-by-site. This year the report also features a series of chapters that examine in depth some of the new topics that are now a routine part of the questionnaire. As in the past, the report includes a summary table of data from each site, but this year the tables also show risk for drug and alcohol dependence, admissions to treatment, and drug market participation. Another series of essays documents the new ADAM method and explores possible new ways to apply it. For policymakers, there is a broad overview of drug use among the population at risk for crime. For practitioners in the justice system who deal day-to-day with drug use and related crime, ADAM offers information useful for planning control strategies. For researchers, the ADAM data offer myriad possibilities for investigating the drug-crime link. Overall findings from 2000 reveal that drug use continued to be common among adult male arrestees, as in previous years. The ADAM redesign strengthens the reliability of the findings and makes it possible to explore new areas of drug use and related behavior. (GCP)